Effects of hydrodynamic film boundary conditions on bubble-wall impactElectronic supplementary information (ESI) available: High speed videos corresponding to Fig. S1 and S2. Details of additional theoretical results and numerical calculation. See DOI: 10.1039/c3sm51769a

Nanoscale interfaces among liquids, solids and gases determine the macroscopic dynamics of a bubble ( e.g. the terminal rise velocity and bouncing behavior). Here high-speed interferograms of liquid films created from rising and bouncing bubbles are compared against mobile and immobile interface models. Quantitative agreement of the thin film dynamics with lubrication theory is obtained. Bubbles in deionized water display mobile and immobile dynamics behavior: bubble-surface interactions suggest a mobile interface but its rise velocity is reduced by the immobile bubble interface at the rear. Bubble-surface interactions are consistent with a mobile interface whereas rise velocity suggests the presence of a stagnant cap.